[EDIT] It appears the below is a list all airlines and their on-the-ground contractors, regardless of whether the contractor man’s the transit desk for the specific airline’s flights. Not sure I understand why we need to know at the transit desk that e.h. POS Aviation supports SQ if they don’t support at the desk itself, but there you go… [/EDIT]

Random update, but in case anyone is looking for transit desk options at KLIA, these were the airlines / providers listed about 12 months ago (at the Satellite transfer desk):